Brake-shoe.



'1.1. KINZER.

BRAKE SHOE.

APPLICATIONA FILED DEC. 30. 1915.

,1,21 9,462. Patented Mar. 20, 1917.

WITNESSES JOHN JACOB KINZER, OFWILDWOOD, PENNSYLVANIA, ASSIGNOR T0 PITTSBUBG BRAKE SHOE COMPANY, OF PITTSBURGH, VANIA.

PENNSYLVANIA, A CORPORATION 0F PENNSYL- BRAKE-SHOE.

Specification of Letters Patent.

Patented Mar. 20, 1917.

Applicationled December 30, 1915. Serial No. 69,377.

To all whom t may concern:

Be it known that I, JOHN JACOB KINZER,

new and useful Improvement in Brake-` Shoes; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to brake-shoes and has special reference to what is known as filled shoes by havin-g a composition of metal in the wheel engaging body thereof.

In this class of brake-shoes it is desired to overcome the dificulties heretofore eX- perienced in forming a brake-shoe, in which the back is to be used over again when the i body portion is worn out, and to prevent fracture the same when in use or idle, so that the object of my invention is to provide a cheap, simple and eticient form of a brake-shoe in which the back can be used a number of times when the body is worn down or out, as well as one which will permit expansion and contraction to the extent desired, and one which can be easily and quickly manufactured, assembled and taken apart when desired. A further object of the invention is to provide a shoe of this character in which the body will retain its shape under all conditions, and to provide a body which will be formed of a plurality of parts and securely held together.

To these ends my invention consists, generally stated, in the novel arrangement, construction and combination of parts, as hereinafter more specifically set forth and described and particularly pointed out in the claims.

To enable others skilled in the art to which my invention appertains to construct and use my`improved brake-shoe I will describe the same more fully referring to the accompanying drawing, in which- Figure 1 is a plan or back view of my improved brake-shoe;

Fig. 2 is a side-elevation ofthe same;

Fig. 3 is a cross-section on the line 3-3 Fig. 2, looking in the direction of the arrows;

Fig. 4 is a view of one of the body sections removed;

Fig. 5 is a crosssection on the line 4-4,

from expansionandcontraction of Fig. 2, looking in the direction of the arrows;

Figs. G respectively, and

Figs. 8 and 9 are portional views showing the manner of interlocking the blocks and fillers.

Like symbols of reference herein indicate like parts in each of the figures of the drawing. s

As illustrated in the drawing A shows my and 7 are side and sectional views, of another form of the shoe;

improved brake-shoe, which comprises the supporting back member 1, body or wheel bearing portion 2, and supporting lug '8 through which the brake-shoe is connected in the usual manner to the ordinary approved brake-head or hanger.

The body or wheel bearing portion 2 is formed of a plurality of sectional pieces or blocks 4, preferably of a material such as cast iron or fiber, and the fillers 4 0f a composition of frictional material which is well known in the art, thereby forming sections or blocks. These sections or blocks 4 and 4 of different materials, alternate with each other, and the side faces 5 of such yblocks 4, which bear against the fillers 4 are tapering inwardly and outwardly from the back wall or strip 1 of the member l, for the purposes as hereinafter described. The rear of the sections or blocks 4 and fillers 4, areprovided with seats 6, within which the snpporting back member 1 fits, and which mem? ber is formed of metal, preferably steel, so as to be ductile or semi-elastic, and provided with the usual short bearing surfaces 7 having recesses 7', which are formed at the ends of the same, and are adapted to abut against bearings on the ends of the brake-head or hanger, while the usual central or intermediate bearings on 'said head or hanger are adapted to abut against such back member on each side of the lug 3. The back member 1 is also provided with the end walls or hook portions l, which are turned in from the back wall or strip 1 and bear against the side walls or faces 5 on the end sections or blocks'in place in the shoe A when formed.

The supporting lug 3 can be connected to the shoe A in any suitable manner, and as shown, is formed of metal, such as steel, and is preferably separate from the back wall 1. The lug 3 is attached to the back wall l of Ilegs or standards 3 the back member l by having its supporting passed through slots 2 in such back wall, with the ends 3 of such legs bent under such wall, and placed within seats 4*I in the blocks 4 and fillers 4.

In the formation of my improved brakeshoe A, the `back member 1 is cut to shape and size desired, which forms the' back wall l', after which it is pressed or stamped to shape to form .the .bearing surfaces 7 and end walls 1, and it is also punched to form the slots 2 in such wall. The sections or blocks 4 are formed and cut to the shape and size desired, and are placed on such back member l andspaced between the end walls 1 on the back member 1 while such back is suitably supported to form the tapered spaces or openings 4 between the same by the side faces 5 thereon.y The lug 3 can now be connected to the back wall l in the manner above described, and then while the back l and blocks are supported, the composition of frictional material is spread overv and between the tapered spaces or openings 4 between the blocks 4, which material will thereby Iill such openings, so that suitable pressure can be supplied to such illed openings to pack and secure such material therein and thereby form such fillers 4, as well as the seats 48L in the samefor the reception of the lug ends 8". Suitable pressure can now be applied to the inner ends of such sections or lblocks 4'while such blocks and' such ends of the iillers 4 and back member 1 are securely held in, dies or any other suitable means, which will bend such back and form the finished brake-shoe by giving to the back and blocks the proper curvaturefor the blocks to conform to the wheels in forming thel body or wheel bearing portion. 2. These blocks 4, when the back l is so curved, will be further pressed against the fillers 4 bytheir side faces 5, by lsuch fillers yielding to the extent desired, and thus said blocks and fillers will be held firmly in place in such back and between the wall 1 and end walls 1, such end walls being thus drawn more firmly against the end blocks 4 and allowing the back member 1 to form aclamp- 1n connection with said blocks and llers. Wen the sections 4 and 4 are worn down to x the limit they can be removed easily and uickly by supporting the ends 1" of the c amping back member 1 and then pressing lip or iange 9 forextending over the secshape on their side faces, as shown in proved brake-shoe may new body members to be tions or blocks 4, as shown in Figs. 6 and 7, in order to assist in holding suchblocks in placewithin such member, while the blocks 4 can also be securely locked in position by forming such blocks with aconcavo-coiyex 1 8, or can be so secured by being providl with an opening 10 in the same, as shown in Fig. 9, in order to allow the material for forming the llers 4 to be packed into the same and thereby interlock the iillers and blocks together. A

It will be evident that the filler blocks or sections can be previously formed to shape and place'd between the compressing sections or blocks for being clamped within the back member with such blocks, and said filling Dmaterial may be plastic.

Various other modications and changes in the design and construction of my imbe resorted to, without departing from the spirit of the invention or sacrificing any of its advantages.

It will thus be seen that after my improved brake-shoes have been in use and have become worn down on their bodies, they can be returnedto the manufacturer to enable the backv member to be vused over again by the removal of the vback member therefrom'and without injuring or fracturing such back` member, which will permit used with the same back anumber of times, and thereby greatly cheapen the cost of manufacture.

vIt vwill also be seen that my improved brake-shoe can be easily and quickly manu; factured, assembled for use and taken apart for permitting the continued use of the back member after the body of the same has become worn or for any other cause, while such shoel will also be strong and durable whenin use and will be able to withstand knocks or blows of any kind. The shoe will also `permit of use until its body is practically worn entirely away, and will have all the substantial advantages of lightness and capability of use on modern high speed trains and especially with steel cars andhigh brake pressure. The body of the shoe being formed in sections or blocks will also permit of expansion and contraction of the shoe and thereby prevent the samejfrom breaking through heat and cold conditions in the shoe when in use or idle. vided with a sectional casing or retainer, it will not becomefworked or twisted out of curvature by frictional heat, but will stayin full contact with the face of the wheel and retarding heavy and high speed trains, while such casing or retainer also enables material to be used which willbe best suited for the wheel upon which it brakes, and1 which heretoforehas been barred from use by its liability to fracture and other causes.

The shoe being prol consequently give a much higher eiiciency -in Gil It will also be evident that my improved brake-shoe does not have its back member permanently attached to the body or Whpel engaging portion of the same but forms a clamp-ing -connection therewith, so that if desired, such back member can be'formed of spring metal which should be sufficiently resilient to enable it to be spread open to receive the body portion for clamping the same or removal of said body portion.

What I claim as my invention and desire to secure by Letters Patent is 1. A brake-shoe comprising a back member and a body member composed of la plurality of sections or blocks, said back member and blocks being shaped so that in bending said back member to a curve the latter will grip and secure said blocks.

2..A brake-shoe comprising aback member and a body member composed of a plurality of interlocking wedge-shaped sections,

or blocks for engaging the wheel, and means for retaining said blocks in position by end pressure.

' 3. A brake-shoe comprising a back member and a body member composed of a plurality of wedge-shaped sections or blocks, said sections or blocks being formed alternately of two dierent materials. v

4. A brake-shoe comprising a back member and a body member composed of a plurality of wedge-shaped sections or blocks, said blocks being formed alternately of metal and a yielding filling material.

5. A brake-shoe comprising a metallic back member and a body member connected with said back member, said body member comprising a series of similarly shaped blocks spaced apart and extending` across said back member, and a series of filling members, of a different material from said blocks, disposed in the spaces between said blocks and forming, with said blocks, a continuous braking surface, said back member having downturned ends, and being bent to cause said ends to engage and secure the blocks .and lling members of said body member.

6J A brake-shoe comprising a back member and a body member composed of a plurality of wedge-shaped wheel-engaging sections or blocks disposed side by side to form a continuous member, said sections or blocks being supported by said back member.

7. A brake-shoe comprising a back member having a back wall, and a body member composed of a. plurality of sections or blocks, said sections or blocks having seats Within the same for the reception of said back wall.

8. A brake-shoe comprising a back member having a back wall, and a body member composed of a plurality of wedge-shaped sections or blocks, said sections or blocks having seats Within the same for the reception of said back wall.

9. A brake-shoe comprising a back member and a body member comprising a plurality of 'sections or blocks, and end walls on said back member for engaging with said sections or blocks to hold the same in place. w

10. A brake-shoe comprising a back member and a body member composed of a plurality of Wedge-shaped sections or blocks, and end Walls on said back member for engaging Wlth said sections or blocks to hold wearing quality than the wheel engaged by such member.

12. A brake-shoe comprising a back member and a body member composed of a plurality of Wedge-shaped sections or blocks `formed of a material having a lesser Wearing quality than the wheel engaged by such shoes.

13. A brake shoe, comprlsing a plurallty 4of sections for forming a wheel engaging portion, said sections being formed of separate disconnected blocks of material extending laterally of the shoe, and separate disconnected illers of frictional material between said blocks, both having a lesser wearing quality than the Wheel, and a back member associated with said sections and having downturned ends for engaging said sections, thereby to retain them in place.

14. A brake shoe comprising a plurality of sections for forming al wheel engaging portion, said sections being formed of separate disconnected blocks ,of material extending laterally of the shoe, and separatey disconnected llers of frictional material between said blocks, both having a lesser wearing quality than the wheel, and means for holding said sections in place, said holding means comprising a back plate having downturned ends for engaging said sections.

icc

15. A brake-shoe comprising a plurality of sections for forming a wheel engaging portion, said sections being formed of blocks of material and fillers of frictional material between the same,'both having a lesser Wearing quality than the Wheel, and a block member connected to said sections for clamping said sections together.

16. A brake-shoe comprising a pluralityy 18.`A brake-shoe comprising a plurality of sections for forming a wheel engaging portion, said sections being formed of blocks 'of material and a lling of rictional material between the same, andI spaces in said blocks for the reception'of said lling material -to interlock said section s.

19. A brake-shoe comprising a plurality of sections for forming a wheel engaging portion, and means for holdingsaid sections together by end ressure. y 20. A brake-s oe comprising a plurality of wedge-shaped sections for forming a wheel engaging portion, and means for holding said' sections together by end pressure.

21. A brake-shoe comprising a plurality of sections 'for forming a Wheel engaging.v portion, and means for clampingsaid sections together endwise.

22. A brake-shoe comprising a plurality of wedge-shaped sections for' formingv a wheel engaging portion, and means for f2() clamping said sections together endwise.

23. A brake-shoe comprising a back having end portions therein, and a body member 'composed of ,a plurality of vwheel engaging sections associatedwith said ba'ck and clamped between said ends.

24. A brake-shoe' comprising a back having end portions therein, and a body member composed ofa plurality of wheel engaging wedge-shaped sections associated with said back and clamped between said ends.

In testimony whereof, I the said JOHN JACOB KINZER have hereunto set my hand.

- JOHN JACOB KINZER. Witnesses:

A., D. P. MILLER, J. N. COOKE. 

